I have a question. Should i with draw my reward to stake in back?

a wallet contains two types of funds: - regular funds that are used for usual transactions - rewards earned that go against static account address (unique per account) Rewards are limited in functionality (you cannot select and transact partially from rewards balance) both, transaction and rewards together form your delegation stake..withdraw allows you to move those rewards to payment addresses , as well as when you decide to stop staking (or using that wallet) -> it allows you to deregister your keys which returns you 2 ADA deposit that you paid when staking for the first time